Machine control system



Jul 1, 1969 PAYNE ET AL 3,453,549

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1. A SYSTEM FOR REGISTERING THE RELATIVE POSITION OF A MACHINE WORK TOOL WITH RESPECT TO A WORKPIECE SUPPORT DURING RELATIVE MOVEMENT THEREBETWEEN, COMPRISING A PULSE GENERATOR HAVING A PULSE OUTPUT RESPONSIVE TOO MOVEMENT THROUGH PREDETERMINED INCREMENTAL DISTANCES, A MULTI-BIT BINARY REGISTER FOR REGISTERING SAID RELATIVE POSITION IN BINARY CODE NOTATION SIGNALS, A COMBINING CIRCUIT CLOCK MEANS FOR PRODUCING PULSES TO CONTINUOUSLY CIRCULATE THE CONTENTS OF SAID REGISTER THROUGH SAID COMBINING CIRCUIT AND BACK TO SAID REGISTER ONE BIT AT A TIME IN SEQUENCE FROM THE LEAST SIGNIFICANT BIT TO THE MOST SIGNIFICANT BIT, SAID CLOCK MEANS ADAPTED TO PROVIDE A RECIRCULATING PERIOD SUBSTANTIALLY LESS THAN THE INTERVAL BETWEEN SAID PULSE GENERATOR PULSES, MEANS RESPONSIVE TO SAID PULSE GENERATOR FOR PRODUCING A SYNC PULSE IN SYNCHRONISM WITH ONE OF SAID CLOCK PULSES, MEANS RESPONSIVE TO SAID SYNC PULSE FOR PRODUCING A BIT PULSE AND FEEDING SAID BIT PULSE TO SAID COMBINING CIRCUIT IN SYNCHRONISM WITH THE CLOCK PULSE WHICH CIRCULATES THE LEAST SIGNIFICANT BIT OF SAID REGISTER INTO SAID COMBINING CIRCUIT, AND MEANS FOR RESETTING SAID SYNC PULSE PRODUCING MEANS BEFORE THE INPUT OF THE NEXT PULSE GENERATOR PULSE. 